The Gear Sector,worm Wheel, cataloged under National Stock Number 3020-01-399-6281, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-399-6281 |
| Primary Part Number | DF1500-249-10 |
| Item Name | Gear Sector,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.750 INCHES BOTH ENDS IN |
| Helix Angle | 5.0499 DEGREES |
| Teeth Quantity | 12 |
| Nominal Outside Radius | 2.088 INCHES IN |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 PLAIN AXIALLY THROUGH BODY FIRST END |
| Throat Nominal Radius | 2.089 INCHES IN |
| Face Type | CONCAVE |
| Mounting Hole Nominal Diameter | 1.564 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Hardness Rating | 27.0 ROCKWELL C NOMINAL OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | MIL-S-5000 COND-C-2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Arc Nominal Length | 1.754 INCHES IN |
| Pitch Radius | 1.9500 INCHES NOMINAL IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Mating Thread Lead Quantity | 1 |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.000 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DF1500-249-10 PRIMARY | Naval Sea Systems Command (USA) |
| DF1500-249 PC 10 PRIMARY | Naval Sea Systems Command (USA) |
| 167-6404330 FIND 10 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211054931 | 5/1 Secondary reference Naval Sea Systems Command |
| 167-6404330 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-399-6281 is a Gear Sector,worm Wheel, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-399-6281 has 3 manufacturer part numbers on file: DF1500-249-10 (Naval Sea Systems Command), DF1500-249 PC 10 (Naval Sea Systems Command), 167-6404330 FIND 10 (Naval Sea Systems Command).
6 possible matches (shared part number, not a government interchangeability claim): 3020-01-399-6282, 3020-01-400-2040, 3040-01-400-2041. Verify interchangeability with system specifications before substitution.
Key specifications for DF1500-249-10: Bore Nominal Diameter: 1.750 INCHES BOTH ENDS IN; Helix Angle: 5.0499 DEGREES; Teeth Quantity: 12; Nominal Outside Radius: 2.088 INCHES IN. 20 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.